Air-tempering device.



MIN DE LIN MQGERRY. & F. P. MIES.

AIR TBMPEEING DEVICE.

APPLICATION FILED MAY 23, 1910.

1,050,484, I v Patented Jan.14,1913.

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MIN DE LIN MCGERRY AND FRANK P. MIES,

OF CHICAGO, ILLINOIS, ASSIGNORS, BY

DIRECT AND MESNE ASSIGNMENTS, TO THE PLURAL SYSTEM VENTILATOR C0.

AIR-TEMPERING DEVICE.

Specification of Letters Patent.

Patented Jan. 14, 1913.

Application filed May 23, 1910. Serial No. 563,005.

' ture to invalids.

One of the objects of our invention is to provide a device whereby the air may be cleansed and tempered to the proper degree and conveniently supplied to invalids while in recumbent position.

Another object of our invention is to supply a device which will not only temper and ,conduct the air to the invalid but which may be used to impregnate the air with any desired medicated material and conduct it to the invalid while said material is held in suspension in the air, and means surrounding the lnvallds head to shut off other air and to permit only the air coming through the device to be inhaled by the sub ject.

Other and further objects of our invention will become apparent to persons skilled in the art from a consideration of the specification taken in conjunction with the accompanying drawings, wherein Figure 1 is a plan View of the device, with the receiving cap turned so as to show a front elevation; Fig. 2 is a central cross sectional view of the receiving cap; Fig. 3 is a central longitudinal sectional view of the same; Fig. 4 is a plan view of the receiving cap, showing the perforations in the upper outer walls for the escape of the air or gases coming from the patient; Fig.

5 is a side elevation of the coolin device I showing a plurality of separate independent air ducts; Fig. 6 is an air valvefor varying the number of air ducts to be contained in the air pat-h; and Fig. 7 is a diagrammatic view of the electric circuits employed in the heating device.

In all of the views, the same reference characters indicate similar parts.

10 is a pipe, or other conduit, which may lead from without the apartment from an air supply, or it may lead fro-m an ozone or other supply of like substance, and may extend to any convenient distance, where such supply is afforded. 11 is a cleaning or screening device, provided with a perforate diaphragm, 12, for cleaning the air, or arresting the particles held in suspension in the air.

13 is a pipe from the cleaning device to a point, 14:, where the pipe 13 is bifurcated, the branch, 15, leading to the heater, l6, and the branch, 17, leading to the cooler, 18.

The heater and cooler are both contained in the casing, 19, which is provided with a double wall with suitable heat insulation, 20, contained between the walls. The composite wall, 21, separates the heater and cooler. The heater consists of a chamber, 22, containing electro-thermic devices, 23, of which there may be any suitable number, provided with a controlling switch, 24, by which a larger or smaller part of the heating medium may be maintained in the electric circuit for the purpose of controlling the temperature of the air passing through the chamber 22. The air emerges from the chamber 22 into the pipe 25, to a point, 26, where said pipe is connected to a pipe 27, which is preferably flexible in character, for the purpose of convenience in manipulation, and which may be made by employing a helical wire coil covered with suitable air proof material, such as coated canvas, or the like, substantially as shown in-cross section at 28.

At the junction of the pipes, 15 and 17, with the pipe, 13, there is a damper, 29, which controls the air that may enter the pipes 15 and 17 respectively, from the pipe 13. When the damper 29 is placed to its extreme position on the left, all of the air from the pipe 13 will pass into the pipe 15, and when the damper 29 is placed to the extreme position on the right, all of the air from the pipe 13 will enter the pipe 17, and when the damper is placed in intermediate position, the air that will enter the pipes 15 and 17, respectively, will be in proportion to the opening in the respective pipes afforded by the position of the damper 29, so that the proportion of the incoming air to the cooler and heater may be regulated to a nicety by this means. The cooling device consists of a chamber, 30, in

"which is located the sisting of a head, 32,

with, the respective heads, 32 and, 36, are suhuiei -ed tor the purpose oit cooling the air when it passes through said chamber. The pipe 38 connected to the head 36, for conducting the air therefrom and joins the pipe 2"? at the point 26.

To prevent the cooled air or heated air from hacking into the opposite chamber, we provide a damper 39 which in all respects is similar to dampe" 29, so that Wlllfil the air flowing through the heater only, the damper 39 may be placed so as to close the pipe so that the heated air will not back up into the cooled chamber, and when the damper 39 is placed so as to close the pipe the cooled air Will not back up into the heating chamber.

The valve is so arranged that a greater or less number of conduits, may be included in the air passage through the coolin chamber, so that the quantity ot air pas 11,; through the cooling device may be by this means varied, and likewise the temperature of the air maybe varied. The valve 3 comprises a crescent-shaped and stepped or notched shield of a generally ring character as indicated in w the number of conduits that will be opened or closed, as the case may be, will be ierininately varied by the position of the vhield. The structure is plainly indicated in the (11; Wine, and operates so that a single conduit may he opened, or the full number, accordlntt to the position at the shield, or all of the conduits may be opened or closed as desired by the manipulation of the handle damper ll is placed in the pipe 27, so as to provide a means near the patient tor the purpose ot varying; the quantity of tempered air delivered the receiving cap, the latter being generally indicated by at.

ihis damper is so located that he nurse or a t endaut may vary the quantity of air Without the necessity ot leaving the patient, or the patient may himself operate the damper tor the intended purpose. The receiving cap is preferably a double wall structure providing a glass trout, L2, so that the vision of the patient 18 not cut ott by the cap when placed over the head. The incoininn' air from the pipe 2? passes into the chamber to, strikes the Wall i -l, and downwardly deflected to the openings, i l, a part of the air passing through the cl'iamber 45, to the chamber ll provided in the back of the cap, by the Walls, t? and at. C he air cacao passes through the chamber l6 into the chamber all), in the opposite end ot the cap where it passes out through the apertures 50. To preventturther direct draft at the air, a battle ivall, 51, is provided near the top of the cap, with an opening, 52, through which the air passes to the chamber 53, and out through the openings, 54-, provided in the top ot the cap. Xi curtain, is provided. on th trout of the device, closing the space between the curved surface of the glass and the patients neck, to retain the air in the ca ll' hen it is desired to supply air of certain or desired quality or character to a patient, the cap ll is placed over his head, 'Wllllt) he is reclining in bed, and the air is forced through the cap provided by the device by means ot a tan or other air propelling agency which is not necessarily SliO'Wii in the drawing. of this case.

The operation of the device Will become apparent readily to persons skilled in the art without turther description. it it is desired to have any additional qualities in the air, by having it carry a liuid or the like, such medicated body or material may be placed in the heating chamber, 529;, or in the head, as the case may be, so that it the air car ing such quality is to be heated, it will be advantageous to place the material in the heating chamber, and it it is to be cooled it will be advantageous to place it in iolin chamber or separate medicated ie e: sul'istance may be placed in each ol the chambers, and the means tor heating or cooling the air so medicated may be used or s desired laying fully described our invention, its ion and use, and realizing that many r t is may oe made in the details of coir tion without departure theretrom with in the scope ot the claims, What We claim new and desire to secure by Letters Patent of the United Fitates, is:

1. it, :ap to administering air to a, pa tient consistin of a rectangular structure having double Walls on three sides, one of the outer Walls yn'ovided with an opening, and the inner Walls provided with a series of pertorations discharging from the space lfietiveen said inner and outer walls into the interior of the structure, another Wall of said structure being perforate, a battle plate within said pert Wall, and another Wall oi said structure being suitably shaped to e 'i'it emplacement of said structure over i in the head ot a reclining; patient.

it, cap for administering an to a paconduit connection communicating with the space contained between the side walls of said cap.

3. In a device of the character described, the combination of a cap adapted to inclose the head of a patient, an air conduit associated therewith, air tempering means in said conduit comprising regulable heating means, regulable cooling means, and independent air passageways over both, the conduit being bifurcated for communication with the passageways over either of said regulable means, a damper in said conduit at the bifurcated point for closing either In testimony whereof we hereunto set ourhands.

MIN DE LIN MCGERRY. FRANK P. MIES.

In the presence of NORMAN A. BECK, OTTO G. RYDER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

